[英]Return all table's rows in a Select field laravel Nova
我了解您在类别 model 与其自身之间存在自引用关系,例如
class Category extends Model
{
public function parent()
{
return $this->belongsTo(Category::class, 'parent_id');
}
public function children()
{
return $this->hasMany(Category::class, 'parent_id');
}
}
在 Nova 中,您通常不会将 Child 与其 Parent 之间的关系表示为 Select 字段,而是作为 BelongsTo 字段,例如:
BelongsTo::make('Parent Category', 'parent', Category::class)->searchable()->nullable(),
但是您可以使用 Select 字段来预加载类别数组,以便您可以过滤掉当前类别 onlyOnForms()。
你可以这样做:
public function fields(Request $request)
{
$fields = [
// [ All your fields ]
// We'll use a Select but onlyOnForms to show all categories but current category when in Forms
Select::make('Parent', 'parent_id')->options(Category::where('id', '!=', request()->resourceId)->pluck('name', 'id'))->onlyOnForms(),
// Use a BelongsTo to show the parent category when in Details page
BelongsTo::make('Parent', 'parent', Category::class)->searchable()->nullable()->showOnDetail()->hideWhenCreating()->hideWhenUpdating(),
];
}
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